der Mouse a écrit :
> I'm seeing something peculiar-looking, and I'm wondering whether this
> is the bug it looks like to me, or a misunderstanding in my
> expectations somewhere, or what.
> 
> On NetBSD/i386 3.0:
> 
> # ifconfig ex0
> ex0: flags=8a63<UP,BROADCAST,NOTRAILERS,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
>         address: 00:10:4b:63:01:94
>         media: Ethernet autoselect (100baseTX full-duplex)
>         status: active
>         inet6 fe80::210:4bff:fe63:194%ex0 prefixlen 64 scopeid 0x3
> # ifconfig ex0 10.100.0.1/30
> # ifconfig ex0 10.100.0.100/24 alias
> # netstat -rn -f inet
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags     Refs     Use    Mtu  Interface
> 10.10.10/23        link#1             UC          2        0      -  fxp0
> 10.10.10.10        00:02:b3:1a:9e:91  UHLc        0        4      -  fxp0
> 10.10.10.20        08:00:20:1f:7c:95  UHLc        2     2094      -  fxp0
> 10.100/30          link#3             UC          0        0      -  ex0
> 127/8              127.0.0.1          UGRS        0        0  33192  lo0
> 127.0.0.1          127.0.0.1          UH          1        0  33192  lo0
> # 
> 
> Note in particular the lack of a route to 10.100/24 corresponding to
> the "alias" address.  But if the /30 is a different one (but still
> within the /24), it all works as expected:
> 

if you delete the first address (the /30), the route for /24
"reappears". may be a bug in netstat?